A mass/charge-selected ion beam from a small accelerator is merged with a counter-propagating photon beam over a common path of tens of centimeters. A downstream analyzing magnet and electrostatic deflector disperse the ion beam according to charge/mass ratio.

Detectors

Single channel electron multiplier

Spot size at sample

~ 1500 µm x 1500 µm, < 1 mrad divergence

Samples

Beams of singly and multiply charged positive ions and of negative ions (atomic and molecular) at keV energies produced by an electron cyclotron resonance (ECR) or a sputter ion source

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University of Nevada, Reno Phone: (775) 784-6816Fax: (775) 784-1398

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Western Michigan University Phone: (616) 387-4955 Fax: (616) 387-4939

ENDSTATION INFORMATION

Endstation name

High-resolution atomic and molecular electron spectrometer (HiRAMES)

Characteristics

The electron spectrometer uses a gas cell on the beam axis to form the interaction region between the sample and the photon beam. The analyzer rotates from 0° to 90° relative to the photon beam, permitting angle-resolved measurements.